Gate voltage control circuit of a power amplifier
US5914641A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1997 |
| Grant date | Jun 22, 1999 |
| Priority date | — |
| Expiry date | Aug 11, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/318
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A gate voltage control circuit of a power amplifier for reducing the power dissipation by improving the efficiency at an average output power and for enhancing the linearity of the power amplifier at a maximum output power, the gate voltage control circuit comprising an input terminal for receiving an output power signal from a power amplifier; an output power detecting circuit for detecting the output power signal and for converting the detected output power signal to a DC voltage signal; a voltage dividing circuit comprising at least two resistors for dividing a voltage difference between the DC voltage signal and a negative voltage in a ratio of resistances of the resistors; and an output terminal for supplying the divided voltage as a gate voltage control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.